111 lines
3.7 KiB
Plaintext
111 lines
3.7 KiB
Plaintext
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "OutputContext.h"
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#if USE(AVFOUNDATION)
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#include "OutputDevice.h"
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#include <mutex>
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#include <pal/spi/cocoa/AVFoundationSPI.h>
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#include <wtf/NeverDestroyed.h>
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#include <wtf/text/StringBuilder.h>
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#include <pal/cocoa/AVFoundationSoftLink.h>
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namespace PAL {
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OutputContext::OutputContext(RetainPtr<AVOutputContext>&& context)
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: m_context(WTFMove(context))
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{
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}
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std::optional<OutputContext>& OutputContext::sharedAudioPresentationOutputContext()
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{
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static NeverDestroyed<std::optional<OutputContext>> sharedAudioPresentationOutputContext = [] () -> std::optional<OutputContext> {
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if (![PAL::getAVOutputContextClass() respondsToSelector:@selector(sharedAudioPresentationOutputContext)])
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return std::nullopt;
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#if PLATFORM(MAC) || PLATFORM(MACCATALYST)
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AVOutputContext* context = [getAVOutputContextClass() sharedSystemAudioContext];
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#else
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auto context = [getAVOutputContextClass() sharedAudioPresentationOutputContext];
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#endif
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if (!context)
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return std::nullopt;
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return OutputContext(retainPtr(context));
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}();
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return sharedAudioPresentationOutputContext;
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}
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bool OutputContext::supportsMultipleOutputDevices()
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{
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return [m_context respondsToSelector:@selector(supportsMultipleOutputDevices)]
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&& [m_context respondsToSelector:@selector(outputDevices)]
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&& [m_context supportsMultipleOutputDevices];
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}
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String OutputContext::deviceName()
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{
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if (!supportsMultipleOutputDevices())
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return [m_context deviceName];
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StringBuilder builder;
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auto devices = outputDevices();
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auto iterator = devices.begin();
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while (iterator != devices.end()) {
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builder.append(iterator->name());
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if (++iterator != devices.end())
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builder.append(" + ");
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}
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return builder.toString();
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}
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Vector<OutputDevice> OutputContext::outputDevices() const
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{
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if (![m_context respondsToSelector:@selector(outputDevices)]) {
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if (auto *outputDevice = [m_context outputDevice])
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return { retainPtr(outputDevice) };
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return { };
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}
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auto *avOutputDevices = [m_context outputDevices];
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Vector<OutputDevice> outputDevices;
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outputDevices.reserveInitialCapacity(avOutputDevices.count);
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for (AVOutputDevice *device in avOutputDevices)
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outputDevices.uncheckedAppend({ retainPtr(device) });
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return outputDevices;
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}
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}
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#endif
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